1#ifndef __ASM_SH_PAGE_H 2#define __ASM_SH_PAGE_H 3 4/* 5 * Copyright (C) 1999 Niibe Yutaka 6 */ 7 8/* 9 [ P0/U0 (virtual) ] 0x00000000 <------ User space 10 [ P1 (fixed) cached ] 0x80000000 <------ Kernel space 11 [ P2 (fixed) non-cachable] 0xA0000000 <------ Physical access 12 [ P3 (virtual) cached] 0xC0000000 <------ vmalloced area 13 [ P4 control ] 0xE0000000 14 */ 15 16#ifdef __KERNEL__ 17 18/* PAGE_SHIFT determines the page size */ 19#if defined(CONFIG_PAGE_SIZE_4KB) 20# define PAGE_SHIFT 12 21#elif defined(CONFIG_PAGE_SIZE_8KB) 22# define PAGE_SHIFT 13 23#elif defined(CONFIG_PAGE_SIZE_64KB) 24# define PAGE_SHIFT 16 25#else 26# error "Bogus kernel page size?" 27#endif 28 29#ifdef __ASSEMBLY__ 30#define PAGE_SIZE (1 << PAGE_SHIFT) 31#else 32#define PAGE_SIZE (1UL << PAGE_SHIFT) 33#endif 34 35#define PAGE_MASK (~(PAGE_SIZE-1)) 36#define PTE_MASK PAGE_MASK 37 38#if defined(CONFIG_HUGETLB_PAGE_SIZE_64K) 39#define HPAGE_SHIFT 16 40#elif defined(CONFIG_HUGETLB_PAGE_SIZE_256K) 41#define HPAGE_SHIFT 18 42#elif defined(CONFIG_HUGETLB_PAGE_SIZE_1MB) 43#define HPAGE_SHIFT 20 44#elif defined(CONFIG_HUGETLB_PAGE_SIZE_4MB) 45#define HPAGE_SHIFT 22 46#elif defined(CONFIG_HUGETLB_PAGE_SIZE_64MB) 47#define HPAGE_SHIFT 26 48#endif 49 50#ifdef CONFIG_HUGETLB_PAGE 51#define HPAGE_SIZE (1UL << HPAGE_SHIFT) 52#define HPAGE_MASK (~(HPAGE_SIZE-1)) 53#define HUGETLB_PAGE_ORDER (HPAGE_SHIFT-PAGE_SHIFT) 54#endif 55 56#ifndef __ASSEMBLY__ 57 58extern void (*clear_page)(void *to); 59extern void (*copy_page)(void *to, void *from); 60 61extern unsigned long shm_align_mask; 62extern unsigned long max_low_pfn, min_low_pfn; 63 64#ifdef CONFIG_MMU 65extern void clear_page_slow(void *to); 66extern void copy_page_slow(void *to, void *from); 67#else 68extern void clear_page_nommu(void *to); 69extern void copy_page_nommu(void *to, void *from); 70#endif 71 72#if defined(CONFIG_MMU) && (defined(CONFIG_CPU_SH4) || \ 73 defined(CONFIG_SH7705_CACHE_32KB)) 74struct page; 75extern void clear_user_page(void *to, unsigned long address, struct page *pg); 76extern void copy_user_page(void *to, void *from, unsigned long address, struct page *pg); 77extern void __clear_user_page(void *to, void *orig_to); 78extern void __copy_user_page(void *to, void *from, void *orig_to); 79#elif defined(CONFIG_CPU_SH2) || defined(CONFIG_CPU_SH3) || !defined(CONFIG_MMU) 80#define clear_user_page(page, vaddr, pg) clear_page(page) 81#define copy_user_page(to, from, vaddr, pg) copy_page(to, from) 82#endif 83 84/* 85 * These are used to make use of C type-checking.. 86 */ 87#ifdef CONFIG_X2TLB 88typedef struct { unsigned long pte_low, pte_high; } pte_t; 89typedef struct { unsigned long long pgprot; } pgprot_t; 90#define pte_val(x) \ 91 ((x).pte_low | ((unsigned long long)(x).pte_high << 32)) 92#define __pte(x) \ 93 ({ pte_t __pte = {(x), ((unsigned long long)(x)) >> 32}; __pte; }) 94#else 95typedef struct { unsigned long pte_low; } pte_t; 96typedef struct { unsigned long pgprot; } pgprot_t; 97#define pte_val(x) ((x).pte_low) 98#define __pte(x) ((pte_t) { (x) } ) 99#endif 100 101typedef struct { unsigned long pgd; } pgd_t; 102 103#define pgd_val(x) ((x).pgd) 104#define pgprot_val(x) ((x).pgprot) 105 106#define __pgd(x) ((pgd_t) { (x) } ) 107#define __pgprot(x) ((pgprot_t) { (x) } ) 108 109#endif /* !__ASSEMBLY__ */ 110 111/* to align the pointer to the (next) page boundary */ 112#define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK) 113 114/* 115 * IF YOU CHANGE THIS, PLEASE ALSO CHANGE 116 * 117 * arch/sh/kernel/vmlinux.lds.S 118 * 119 * which has the same constant encoded.. 120 */ 121 122#define __MEMORY_START CONFIG_MEMORY_START 123#define __MEMORY_SIZE CONFIG_MEMORY_SIZE 124 125#define PAGE_OFFSET CONFIG_PAGE_OFFSET 126#define __pa(x) ((unsigned long)(x)-PAGE_OFFSET) 127#define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET)) 128#define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT) 129 130#define phys_to_page(phys) (pfn_to_page(phys >> PAGE_SHIFT)) 131#define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT) 132 133/* PFN start number, because of __MEMORY_START */ 134#define PFN_START (__MEMORY_START >> PAGE_SHIFT) 135#define ARCH_PFN_OFFSET (PFN_START) 136#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT) 137#define pfn_valid(pfn) ((pfn) >= min_low_pfn && (pfn) < max_low_pfn) 138#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT) 139 140#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \ 141 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) 142 143#include <asm-generic/memory_model.h> 144#include <asm-generic/page.h> 145 146/* vDSO support */ 147#ifdef CONFIG_VSYSCALL 148#define __HAVE_ARCH_GATE_AREA 149#endif 150 151#endif /* __KERNEL__ */ 152#endif /* __ASM_SH_PAGE_H */ 153